Groundside there are no views.
Airside view there are fairly limited through heavy glass, often with very restricted views or double glass walls, just of part of the particular aircraft at the gate / nearby gates. If you are making a domestic or Republic of Ireland flight, there are one or two places where you can see one of the active runways, but these are not usually places you can stand and stare as they are along corridors with continuous traffic.
All in all not any paradise location.
With very slow security and long walks, be sure not to cut your timings too close, if you do find a spot o take shots.